They didn’t buy the car._____ , they didn’t like its color；_____ , it was too expensive.[ ]

If_____________ worries me, I often go to him.

Our food supply ________. We’d better get some in case there’s none left.

He must be the captain ______ group got the first prize in the ping-pong game.

confident,_____ , in my opinion, is themost important in society. result of cancer.